Far to cheap use worcester controls and filter and add 2years warranty to your boiler as said a realistic price to do the job is £1000+ , take the 2 days off and watch how this install is being done you will regret it if you dont .
We recommend uHeat for Underfloor Heating Systems, and The Wetroom Store for all things bathrooms and wetrooms. They provide discounts for forum members.
Welcome to the forum. Although you can post in any forum, the USA forum is here in case of local regs or laws
We recommend City Plumbing Supplies, BES, and Plumbing Superstore for all plumbing supplies.